diff --git a/housekeeping/src/main/groovy/whelk/housekeeping/BulkChangePreviewAPI.java b/housekeeping/src/main/groovy/whelk/housekeeping/BulkChangePreviewAPI.java
index 7efe1fd7cd..e413692468 100644
--- a/housekeeping/src/main/groovy/whelk/housekeeping/BulkChangePreviewAPI.java
+++ b/housekeeping/src/main/groovy/whelk/housekeeping/BulkChangePreviewAPI.java
@@ -26,7 +26,6 @@
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;
-import java.util.Collections;
 import java.util.HashMap;
 import java.util.LinkedHashMap;
 import java.util.List;
@@ -179,6 +178,7 @@ private Map<?,?> makePreviewChangeSet(RecordedChange recordChange) {
         var id = (String) recordCopy.get(ID_KEY);
 
         var result = getChangeSetsMap(beforeDoc, afterDoc, id);
+
         ((Map<String,Object>) DocumentUtil.getAtPath(result, List.of("changeSets", 0))).put("version",
                 beforeDoc.getThing());
         ((Map<String,Object>) DocumentUtil.getAtPath(result, List.of("changeSets", 1))).put("version",
diff --git a/whelktool/src/main/groovy/whelk/datatool/WhelkTool.groovy b/whelktool/src/main/groovy/whelk/datatool/WhelkTool.groovy
index d73ae891ed..566bbb812f 100644
--- a/whelktool/src/main/groovy/whelk/datatool/WhelkTool.groovy
+++ b/whelktool/src/main/groovy/whelk/datatool/WhelkTool.groovy
@@ -25,6 +25,7 @@ import javax.script.Bindings
 import javax.script.CompiledScript
 import javax.script.ScriptEngineManager
 import javax.script.SimpleBindings
+import java.nio.charset.StandardCharsets
 import java.time.ZonedDateTime
 import java.util.concurrent.ConcurrentHashMap
 import java.util.concurrent.ConcurrentLinkedQueue
@@ -762,6 +763,7 @@ class WhelkTool {
         cli.idchg(longOpt: 'allow-id-removal', '[UNSAFE] Allow script to remove document ids, e.g. sameAs.')
         cli.sv(longOpt: 'skip-validation', '[UNSAFE] Skip JSON-LD validation before saving to database.')
         cli.n(longOpt: 'stats-num-ids', args: 1, 'Number of ids to print per entry in STATISTICS.txt.')
+        cli.p(longOpt: 'parameters', args: 1, argName: 'PARAMETER-FILE', 'Path to JSON file with parameters to script')
 
         def options = cli.parse(args)
         if (options.h) {
@@ -776,6 +778,11 @@ class WhelkTool {
         Script script = null
         try {
             script = new FileScript(scriptPath)
+
+            String paramPath = options.p
+            if (paramPath) {
+                script.setParameters(mapper.readValue(new File(paramPath).getText("UTF-8"), Map))
+            }
         }
         catch (IOException e) {
             System.err.println("Could not load script [$scriptPath] : $e")
diff --git a/whelktool/src/main/java/whelk/datatool/bulkchange/BulkJob.java b/whelktool/src/main/java/whelk/datatool/bulkchange/BulkJob.java
index e6ce4cae66..68da78ece3 100644
--- a/whelktool/src/main/java/whelk/datatool/bulkchange/BulkJob.java
+++ b/whelktool/src/main/java/whelk/datatool/bulkchange/BulkJob.java
@@ -85,6 +85,7 @@ protected WhelkTool buildWhelkTool(BulkJobDocument jobDoc) throws IOException {
         var bulkJobThingId = stripSuffix(id, HASH_IT) + HASH_IT;
 
         Script script = jobDoc.getSpecification().getScript(bulkJobThingId);
+
         WhelkTool tool = new WhelkTool(whelk, script, reportDir(systemId), WhelkTool.getDEFAULT_STATS_NUM_IDS());
         // TODO for now setting changedBy only works for loud changes (!minorChange in PostgreSQLComponent)
         tool.setDefaultChangedBy(jobDoc.getChangeAgentId());
diff --git a/whelktool/src/main/java/whelk/datatool/bulkchange/BulkJobDocument.java b/whelktool/src/main/java/whelk/datatool/bulkchange/BulkJobDocument.java
index 889d553b69..9c37cc774e 100644
--- a/whelktool/src/main/java/whelk/datatool/bulkchange/BulkJobDocument.java
+++ b/whelktool/src/main/java/whelk/datatool/bulkchange/BulkJobDocument.java
@@ -20,7 +20,8 @@ public enum SpecType implements JsonLdKey {
         Update("bulk:Update"),
         Delete("bulk:Delete"),
         Create("bulk:Create"),
-        Merge("bulk:Merge");
+        Merge("bulk:Merge"),
+        Other("bulk:Other");
 
         private final String key;
 
@@ -63,6 +64,7 @@ public String key() {
     public static final String LABEL_KEY = "label";
     public static final String KEEP_KEY = "bulk:keep";
     public static final String DEPRECATE_KEY = "bulk:deprecate";
+    public static final String SCRIPT_KEY = "bulk:script";
 
     private static final List<Object> STATUS_PATH = List.of(JsonLd.GRAPH_KEY, 1, STATUS_KEY);
     private static final List<Object> UPDATE_TIMESTAMP_PATH = List.of(JsonLd.GRAPH_KEY, 1, SHOULD_UPDATE_TIMESTAMP_KEY);
@@ -128,6 +130,10 @@ public Specification getSpecification() {
                     get(spec, List.of(DEPRECATE_KEY, "*", ID_KEY), Collections.emptyList()),
                     get(spec, List.of(KEEP_KEY, ID_KEY), "")
             );
+            case SpecType.Other -> new Specification.Other(
+                    get(spec, SCRIPT_KEY, null),
+                    spec
+            );
             case null -> throw new ModelValidationException(String.format("Bad %s %s: %s",
                     CHANGE_SPEC_KEY, JsonLd.TYPE_KEY, specType));
         };
diff --git a/whelktool/src/main/java/whelk/datatool/bulkchange/Specification.java b/whelktool/src/main/java/whelk/datatool/bulkchange/Specification.java
index a3bfc77f58..d338686037 100644
--- a/whelktool/src/main/java/whelk/datatool/bulkchange/Specification.java
+++ b/whelktool/src/main/java/whelk/datatool/bulkchange/Specification.java
@@ -1,5 +1,6 @@
 package whelk.datatool.bulkchange;
 
+import com.google.common.collect.Maps;
 import org.apache.commons.io.IOUtils;
 import whelk.Document;
 import whelk.Whelk;
@@ -11,6 +12,7 @@
 import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.util.Collection;
+import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
@@ -21,7 +23,7 @@
 import static whelk.datatool.bulkchange.BulkJobDocument.DEPRECATE_KEY;
 import static whelk.datatool.bulkchange.BulkJobDocument.TARGET_FORM_KEY;
 
-public sealed interface Specification permits Specification.Create, Specification.Delete, Specification.Merge, Specification.Update {
+public sealed interface Specification permits Specification.Create, Specification.Delete, Specification.Merge, Specification.Update, Specification.Other {
 
     Script getScript(String bulkJobId);
 
@@ -123,6 +125,26 @@ public Script getScript(String bulkJobId) {
         }
     }
 
+    record Other(String name, Map<String, ?> parameters) implements Specification {
+        private static final Map<String, List<String>> ALLOWED_SCRIPTS_PARAMS = Map.of(
+                "removeTopicSubdivision", List.of(DEPRECATE_KEY, KEEP_KEY)
+        );
+
+        @Override
+        public Script getScript(String bulkJobId) {
+            if (!ALLOWED_SCRIPTS_PARAMS.containsKey(name)) {
+                throw new IllegalArgumentException("Script " + name + " not supported");
+            }
+
+            Script s = new Script(loadClasspathScriptSource(name +".groovy"), bulkJobId);
+
+            Map<Object, Object> params = new HashMap<>();
+            params.putAll(Maps.filterKeys(parameters, k -> ALLOWED_SCRIPTS_PARAMS.get(name).contains(k)));
+            s.setParameters(params);
+            return s;
+        }
+    }
+
     private static String loadClasspathScriptSource(String scriptName) {
         String path = "bulk-change-scripts/" + scriptName;
         try (InputStream scriptStream = Specification.class.getClassLoader().getResourceAsStream(path)) {
diff --git a/whelktool/src/main/resources/bulk-change-scripts/removeTopicSubdivision.groovy b/whelktool/src/main/resources/bulk-change-scripts/removeTopicSubdivision.groovy
new file mode 100644
index 0000000000..dc625f1d42
--- /dev/null
+++ b/whelktool/src/main/resources/bulk-change-scripts/removeTopicSubdivision.groovy
@@ -0,0 +1,66 @@
+/**
+ * Remove all uses of a certain TopicSubdivision within ComplexSubject
+ * The TopicSubdivision itself is not removed, only the usages.
+ *
+ * Parameters:
+ * bulk:deprecate - The subdivision(s) to be removed
+ * bulk:keep - If specified, add this regular Topic to :subject instead
+ */
+
+import whelk.JsonLd
+import whelk.util.DocumentUtil
+
+import static whelk.JsonLd.ID_KEY
+import static whelk.datatool.bulkchange.BulkJobDocument.DEPRECATE_KEY
+import static whelk.datatool.bulkchange.BulkJobDocument.KEEP_KEY
+
+List deprecateLinks = asList(parameters.get(DEPRECATE_KEY))
+Map keepLink = parameters.get(KEEP_KEY)
+
+deprecateLinks.each { deprecate ->
+    selectByIds([deprecate[ID_KEY]]) { obsoleteSubdivision ->
+        selectByIds(obsoleteSubdivision.getDependers()) { depender ->
+            Map thing = depender.graph[1] as Map
+
+            if (thing[JsonLd.TYPE_KEY] == 'ComplexSubject') {
+                return
+            }
+
+            def modified = DocumentUtil.traverse(thing) { value, path ->
+                if (value instanceof Map && value[JsonLd.TYPE_KEY] == 'ComplexSubject') {
+                    var t = asList(value.get('termComponentList'))
+                    if (deprecate in t) {
+                        // TODO? add way to do this with an op? SplitReplace? [Replace, Insert]?
+                        if (keepLink && path.size() > 1) {
+                            var parent = DocumentUtil.getAtPath(thing, path.dropRight(1))
+                            if (parent instanceof List && !parent.contains(keepLink)) {
+                                parent.add(keepLink)
+                            }
+                        }
+
+                        return mapSubject(value, t, deprecate)
+                    }
+                }
+                return DocumentUtil.NOP
+            }
+
+            if (modified) {
+                depender.scheduleSave(loud: isLoudAllowed)
+            }
+        }
+    }
+}
+
+static DocumentUtil.Operation mapSubject(Map subject, termComponentList, deprecateLink) {
+    var t2 = termComponentList.findAll { it != deprecateLink }
+    if (t2.size() == 0) {
+        return new DocumentUtil.Remove()
+    }
+    if (t2.size() == 1) {
+        return new DocumentUtil.Replace(t2.first())
+    }
+
+    Map result = new HashMap(subject)
+    result.termComponentList = t2
+    return new DocumentUtil.Replace(result)
+}
\ No newline at end of file